blob: 90392c2acfa05540404e8d1db5d6df20c4435827 [file] [log] [blame]
/*
* ip.c "ip" utility frontend.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <errno.h>
#include "SNAPSHOT.h"
#include "utils.h"
#include "ip_common.h"
#include "namespace.h"
#include "color.h"
#include "rt_names.h"
int preferred_family = AF_UNSPEC;
int human_readable;
int use_iec;
int show_stats;
int show_details;
int oneline;
int brief;
int json;
int timestamp;
int force;
int max_flush_loops = 10;
int batch_mode;
bool do_all;
struct rtnl_handle rth = { .fd = -1 };
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr,
"Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
" ip [ -force ] -batch filename\n"
"where OBJECT := { link | address | addrlabel | route | rule | neigh | ntable |\n"
" tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm |\n"
" netns | l2tp | fou | macsec | tcp_metrics | token | netconf | ila |\n"
" vrf | sr | nexthop }\n"
" OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
" -h[uman-readable] | -iec | -j[son] | -p[retty] |\n"
" -f[amily] { inet | inet6 | mpls | bridge | link } |\n"
" -4 | -6 | -I | -D | -M | -B | -0 |\n"
" -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n"
" -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
" -rc[vbuf] [size] | -n[etns] name | -N[umeric] | -a[ll] |\n"
" -c[olor]}\n");
exit(-1);
}
static int do_help(int argc, char **argv)
{
usage();
return 0;
}
static const struct cmd {
const char *cmd;
int (*func)(int argc, char **argv);
} cmds[] = {
{ "address", do_ipaddr },
{ "addrlabel", do_ipaddrlabel },
{ "maddress", do_multiaddr },
{ "route", do_iproute },
{ "rule", do_iprule },
{ "neighbor", do_ipneigh },
{ "neighbour", do_ipneigh },
{ "ntable", do_ipntable },
{ "ntbl", do_ipntable },
{ "link", do_iplink },
{ "l2tp", do_ipl2tp },
{ "fou", do_ipfou },
{ "ila", do_ipila },
{ "macsec", do_ipmacsec },
{ "tunnel", do_iptunnel },
{ "tunl", do_iptunnel },
{ "tuntap", do_iptuntap },
{ "tap", do_iptuntap },
{ "token", do_iptoken },
{ "tcpmetrics", do_tcp_metrics },
{ "tcp_metrics", do_tcp_metrics },
{ "monitor", do_ipmonitor },
{ "xfrm", do_xfrm },
{ "mroute", do_multiroute },
{ "mrule", do_multirule },
{ "netns", do_netns },
{ "netconf", do_ipnetconf },
{ "vrf", do_ipvrf},
{ "sr", do_seg6 },
{ "nexthop", do_ipnh },
{ "help", do_help },
{ 0 }
};
static int do_cmd(const char *argv0, int argc, char **argv)
{
const struct cmd *c;
for (c = cmds; c->cmd; ++c) {
if (matches(argv0, c->cmd) == 0)
return -(c->func(argc-1, argv+1));
}
fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
return EXIT_FAILURE;
}
static int batch(const char *name)
{
char *line = NULL;
size_t len = 0;
int ret = EXIT_SUCCESS;
int orig_family = preferred_family;
batch_mode = 1;
if (name && strcmp(name, "-") != 0) {
if (freopen(name, "r", stdin) == NULL) {
fprintf(stderr,
"Cannot open file \"%s\" for reading: %s\n",
name, strerror(errno));
return EXIT_FAILURE;
}
}
if (rtnl_open(&rth, 0) < 0) {
fprintf(stderr, "Cannot open rtnetlink\n");
return EXIT_FAILURE;
}
cmdlineno = 0;
while (getcmdline(&line, &len, stdin) != -1) {
char *largv[100];
int largc;
preferred_family = orig_family;
largc = makeargs(line, largv, 100);
if (largc == 0)
continue; /* blank line */
if (do_cmd(largv[0], largc, largv)) {
fprintf(stderr, "Command failed %s:%d\n",
name, cmdlineno);
ret = EXIT_FAILURE;
if (!force)
break;
}
}
if (line)
free(line);
rtnl_close(&rth);
return ret;
}
int main(int argc, char **argv)
{
char *basename;
char *batch_file = NULL;
int color = 0;
/* to run vrf exec without root, capabilities might be set, drop them
* if not needed as the first thing.
* execv will drop them for the child command.
* vrf exec requires:
* - cap_dac_override to create the cgroup subdir in /sys
* - cap_sys_admin to load the BPF program
* - cap_net_admin to set the socket into the cgroup
*/
if (argc < 3 || strcmp(argv[1], "vrf") != 0 ||
strcmp(argv[2], "exec") != 0)
drop_cap();
basename = strrchr(argv[0], '/');
if (basename == NULL)
basename = argv[0];
else
basename++;
while (argc > 1) {
char *opt = argv[1];
if (strcmp(opt, "--") == 0) {
argc--; argv++;
break;
}
if (opt[0] != '-')
break;
if (opt[1] == '-')
opt++;
if (matches(opt, "-loops") == 0) {
argc--;
argv++;
if (argc <= 1)
usage();
max_flush_loops = atoi(argv[1]);
} else if (matches(opt, "-family") == 0) {
argc--;
argv++;
if (argc <= 1)
usage();
if (strcmp(argv[1], "help") == 0)
usage();
else
preferred_family = read_family(argv[1]);
if (preferred_family == AF_UNSPEC)
invarg("invalid protocol family", argv[1]);
} else if (strcmp(opt, "-4") == 0) {
preferred_family = AF_INET;
} else if (strcmp(opt, "-6") == 0) {
preferred_family = AF_INET6;
} else if (strcmp(opt, "-0") == 0) {
preferred_family = AF_PACKET;
} else if (strcmp(opt, "-D") == 0) {
preferred_family = AF_DECnet;
} else if (strcmp(opt, "-M") == 0) {
preferred_family = AF_MPLS;
} else if (strcmp(opt, "-B") == 0) {
preferred_family = AF_BRIDGE;
} else if (matches(opt, "-human") == 0 ||
matches(opt, "-human-readable") == 0) {
++human_readable;
} else if (matches(opt, "-iec") == 0) {
++use_iec;
} else if (matches(opt, "-stats") == 0 ||
matches(opt, "-statistics") == 0) {
++show_stats;
} else if (matches(opt, "-details") == 0) {
++show_details;
} else if (matches(opt, "-resolve") == 0) {
++resolve_hosts;
} else if (matches(opt, "-oneline") == 0) {
++oneline;
} else if (matches(opt, "-timestamp") == 0) {
++timestamp;
} else if (matches(opt, "-tshort") == 0) {
++timestamp;
++timestamp_short;
} else if (matches(opt, "-Version") == 0) {
printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
exit(0);
} else if (matches(opt, "-force") == 0) {
++force;
} else if (matches(opt, "-batch") == 0) {
argc--;
argv++;
if (argc <= 1)
usage();
batch_file = argv[1];
} else if (matches(opt, "-brief") == 0) {
++brief;
} else if (matches(opt, "-json") == 0) {
++json;
} else if (matches(opt, "-pretty") == 0) {
++pretty;
} else if (matches(opt, "-rcvbuf") == 0) {
unsigned int size;
argc--;
argv++;
if (argc <= 1)
usage();
if (get_unsigned(&size, argv[1], 0)) {
fprintf(stderr, "Invalid rcvbuf size '%s'\n",
argv[1]);
exit(-1);
}
rcvbuf = size;
} else if (matches_color(opt, &color)) {
} else if (matches(opt, "-help") == 0) {
usage();
} else if (matches(opt, "-netns") == 0) {
NEXT_ARG();
if (netns_switch(argv[1]))
exit(-1);
} else if (matches(opt, "-Numeric") == 0) {
++numeric;
} else if (matches(opt, "-all") == 0) {
do_all = true;
} else {
fprintf(stderr,
"Option \"%s\" is unknown, try \"ip -help\".\n",
opt);
exit(-1);
}
argc--; argv++;
}
_SL_ = oneline ? "\\" : "\n";
check_enable_color(color, json);
if (batch_file)
return batch(batch_file);
if (rtnl_open(&rth, 0) < 0)
exit(1);
rtnl_set_strict_dump(&rth);
if (strlen(basename) > 2)
return do_cmd(basename+2, argc, argv);
if (argc > 1)
return do_cmd(argv[1], argc-1, argv+1);
rtnl_close(&rth);
usage();
}